Grinding-machine.



H. J. PERKINS. i cfim'nme MAC HINE.

APPLICATION FILED MAY 31. 1917.

4 219 JL m MM IN VEN TOR. i

Patented 0m 4,, 1m.

A TTORNIZ YS.

H. J. PERKINS. GRINDING MACHINE. APPLICATION FILED MAY31, 1911.

Patented Dec. 4, 1917;

8 SHEETS-SHEET 2.

H. I. PERKINS.

'GRIINDING MACHINE.

APPLICATION FILED MAY 31;1911.

Patnted 1060. 41,191?

8 SHEETS-SHEET a //v MEN/0W H h-PERKINS.

GRINDING MACHINE.

APPucAn-ou FILED MAY 31.

H.. 1, PERKINS. GRINDINQ MACHINE. APPLICATION FILED MAY 31, I917;

Patented 1% 1m.-

8 SHEETS-SHEET 5.

GRINDING MACHINE. 'MPHCATION mu) MAY 31. 191T.

PERKINS.

Patented m. 4,191?

a SHEETS-SHEET 6.

'IIIIIIlIIIIII/IIIII Per/(ma H. PERKINS. GRINDING MACHINE. APPLH IA TION FILED MAY 31 191].

W mm 4,191?

s WHEN-SHEET 1 g ll II II H. ,J.-PERKINS.

GRINDING MACHINE.

APPLICATION FILED VMAY3I. 1911.

Patented Dec. 4, 1917.

s SHEETS-SHEET s.

III

. I citizen of the United States'of Atriericatre siding at Grand Rapids; in thecountyof A HARRY a. runiz rns, orcneivnitarrns, w re GRINDING-MACHINE;

teams 3 To all whom itmaf concern: I

Be itknown that I, HA Y J .PERKIns, a

Kent andlSt-ate of Michigan, have'invented certain, new] and useful Improvements; in

Grinding-Machines; and I do hereby declarethe followingto be a full, clear, and,

. jexactfdescriptionofthe invention, such as will enable others skilledin the art to which" it aippertains to make and use the same.

This invention relates to grinding machines adapted particularly for use in grinding cylindrical or tapered metal forms. It is an object'and purpose of the present invention to provide. a grinding machine pf very simple construction and operation.

wherebygrinding of the work may be eft'ected to a minute measure of accuracy. A further ob ect of the invention resides 1n the simplification of the construction shown in r wherebysuch simplification is attained and my former, application for patent 'Ser. No. 118,019 filed Sept. .1, 1916; the present in vention including various and novel features of construction 'and arrangements aamachine produced at amuch lower" cost.

1 Many other objects and purposes not par-' .ticularly enumerated will appear and be .30

made clearas the description of the machine embodying my invention is understood. reference being bad to the accompanying drawings in which; 1

Figure 1 is'a front elevation of the machine.

Fig. 2 is a similar elevation with the front I cover plate removed to show' various parts line 65-43. Fig. 1.

of the driving and reversing mechanism.

Fig. 3 is a horizontal section. taken sub-- stantially on the plane of'line 3 3. Fig. '1. Fig. l'is an end elevation from the right Fig. 5 isa vertical section substantially on the plane of line 5 5 of Fig. 3. Fig. 6 is a similar section on'the planeof Fig. 7 isa'side view. Fig. 8 a front elevation partially in section, and Fig. 91s a vertical 'SQCtlOli on the line 9--9 of Fig; 8,

illustrating the controlling means for the cross feed ofthe grinder.

Fig. 10 is a section of a. detail of structure relating-"to the automatic cross feed.

Fig. 11 is a front elevation: Fig. 12 IS a I (central longitudinal @Gti0n, l1d F g- 1 a i In th in'g' 12 and a similar support provided with Specification ofLetters Patent. Patented nee-attainanimation filed my 31.1917. eel-mint. 72,959. 1

' I transverse section of the c ombined reveltse :stop and tarry forming a part of 'my ineach other.

everal views of t e drawings like reference" characters refer to like parts, and the sectional views are all shown as looking In the direction indicated by the arrows.

In the construction of the machine a.

frame of cast iron, preferably, is provided, including a front wall 1 extending the entire length of the frame, a rear wall 2 of greaterheight than the front wall, ends 3 and 4 of substantially the same height as the rear wall 2 and connecting the ends of walls 1 and j 2 together with an intermedia'te transverse wall 5 substantially half way between and paralleling the end walls 3 and 4. In addition transverse walls 6 and 7 extend to therear'from the wall Z 'and are connected at their rear ends by a wall8 paralleling'tlie'wall 2-. Bases 9 and lil'extend to each side of the rearwardly projecting portion of the fraitne formed by the walls- 6,

7 and 8. fridjacentthe'en'd of base '9 a vertical support llfis' located, carrying a bearearing 13' extends from the base 10. A

shaft 14aflis mounted in the'bearing12 on whichtat one'ench is'fixeda combined clutchmember and driving pulley 15. A-movable clutch member 16 is associated with the,

member 15 and is splined'on the end of a shaft 17 which extends through walls 6 and 7 and adjacent its opposite end is mounted Min b'earing l3. The movable clutch member 16 is adapted tobe actuated in the L usual "manner by rocking a shaft 18 which ektends to adjacent the front of the machine. being carried at its front end in a bearing- 19. and

havinga lever 20 at its front endbymeans of which it may be manually operated. Any

suitable source of power may-be used to drive the member 15.'

Between walls 6 and theuppenen'dS of walls 2 and S are formed-with supporting membersQl and 22Ioir'whichia fra nie 23 is I mounted. it in turnslidabhisupporting a base Spaced apart arms'flfi are cast integralwith the base .ti11d1'8Xli6l1Cl upwardly and forwardly therefrom at their front ends a hood28 and the shaft carries a pulley 29 which is located between thetwo arms 25.

Integral with the base 24 and disposed between arms is a guard 30 which covers and protects pulley 29 and the shaft on which it is mounted from water and dirt thrown off by the grinding wheel. Idle pulley 31 is mounted on the base 24 and 32 is mounted upon a member 33 back ofthe pulley 29.- The member 33 is adjustably mounted on the base 24 between arms 25, a rod 34 connectinn with the; rear end thereof and passing through a. stationary lug 35 with a strong compression .spring 36 interposed between the lug and nuts on the rear end of the rod. The tendency of the spring is to move said member 33 and idle pulleys to the rear. An endless drive belt 37 passes over the idle pulleys around the pulley 29 and also around a drive pulley 38 fastened on the shaft 17, the grinding wheel being driven and the driving belt held under uniform tension in this manner. V A pulley 39 is also fixed to the end of the shaft 17 adapted to drive a suitable pump 40 through a belt 41 as shown in Fig. 3. The pump is supported upon a tank 42 which inturn rests on the base 10 and has an intake pipe 43 extending into the tank. The outlet pipe 44 extends upwardly and is turned over the hood 28 as indicated at 45.

and then turned down and terminates in a nozzle 46 whereby the water is discharged directly onto the grinding wheel as shown.

Shaft 17 carries a worm 47. meshing with a worm wheel 48 on the rear end of a shaft 49 as shown in Fig. 4, the worm and worm wheel are housed by a casing 50. Shaft 49 extends forward through wall 2 and at a point a short distance back and above the front wall 1 and has a beveled pinion 51 on its forward end which meshes with a similar pinion 52 splined upon a horizontal shaft 53 mounted in suitable bearings and paralleling the front of the machine. A clutch member 54 is cast integral with the gear 52 with which a second clutch member 55 is adapted to engage the latter clutch member being cast integral with a collar 56 The movement of splined upon shaft the collar and associated clutch member is controlled by a lever 57 which extends for ward in front of the machine in position for ready manual operation.

At the end of the shaft 53 a series of gears 58 of different sizes are fixed which mesh with similar gears 59 and 60 mounted upon shaft 61 and 62, respe tively. These gears are loose upon shafts 61 and 62 but are adapted to be connected one at a tim there to by the usual sliding key arrangements -well known to all familiar with change speed transmissions of this type and I have indicated levers 63 and 64 at the front of the machine for controlling the keys, said levers being mounted in operative relation to a -selector'arc 65 which indicates the gear selected. The specific method of operating the sliding keys is not shown as it forms no part of the present invention.

Shaft 62 at one end carries a gear ()6 which is engaged with an idle pinion 67 it in turn meshing with a pinion 68 attached to a shaft 69 which is mounted at one end in the transverse wall 5 of the machine and at the opposite end in a suitable bearing formed on a bracket 70 secured to and 'projecting from the frame of the machine. An elongated cylindrical-roller 7l is fixed on shaft 69.

A table 72 is positioned directly above the supporting frame being slidably mounted on guides 7 3 and 74, the former of which is cast integral with the wall 2 while the latter-is located horizontally at the front of and between the end walls 3 and 4. A table 75 lies above the sliding table 72 and in practice is mounted upon a central vertical pivot (not shown) so as to swing thereon, such construction being described in o my previous application for patent. On the table 75,'head and tail stocks 76 and 77 are secured in the usual manner, the former including a pulley 78 around which and the elongated roller 71 an endless belt 79 is positioned whereby whenever roller 71 is driven the head stock is driven simulta neously therewith, the belt traversing the length of the roller 71 as the sliding table moves back and forth as hereafter described. Between the centers of the head and tail stocks the work is held such as the cylinder 80 indicated in Fig. 15. It is, of course, understood that shaft 62 may be driven at a plurality of speeds with respect to the shaft 53 due to the change speed gearing so that the proper speed of rotation of the work 80 may be secured.

In alinement with shaft 61 is a shaft 81 coupled thereto by a sleeve 82. Associated with shaft 81 as the usual reverse gearing 83 for grinding machines which, as it specifically forms no part of the present iuvcntion and is fully described in my previous application for patent above noted is not here outlined. One element of the gearing comprises a bevel gear 84 secured at the front end of a shaft 85 on which, back of the gear, is a pinion 86 in engagement with a gear'S7 fixed to a sleeve 88, which is loose upon a shaft 89 above shaft 85. A pinion 90 is also connected with sleeve 88 and is in engagement with a. rack secured lengthwise of and on the under side ofthe sliding table 72. By this arrangement with the reverse" movement imparted to shaft 85 the table 72 may be moved back and forth over'the supporting frame. The usual lever for effecting the reverse movements of the gearing and table is indicated at '92, having a pro ec-t1ng member 93011 its rear side 1 against which hea'ds94 alternately engage for actuation of the lever. These heads are mounted upon a bar 95 secured 'to the front of table 72 and are of special formation.'

Each includes a relatively stationary 'mem ber 96 to the under side of which a second member 97 is secured, it extending a dis tance back of the r'nember- 96 and being formed with notches 98 on its upper side to engage with the notches and the under side of the bar 95. It also-includes an over v hanging section 99 to receive the upperedge of the bar in which section a set screw 100 is located for the purpose of securing the device in any desired position along the length of bar 95. The member 96 is interiorly bored and is threaded at one end .to receive an adpisting screw 101 by means ofwhich the finer adjustments for positioning the heads 94 may beefi'ected. Each head 91 is integrally formed with a sleeve 102 inside of which acoil spring 103 under compression is placed, bearing against the end of the screw 101 and surrounding a rod 10 fastened at one end tothe head 94,,extending lengthwise oft-he sleeve and passing ljooselv through the screw 101, 7 receiving nuts105 at its end whereby the adjustment of sleev'e102with respect to screw 101 is readily attained. The me1nber96 is split for a short distance adjacent the end which receives the screw 101 and a binding screw 106 passes thercthrough servingto hold the screw 101 in any position to which it may be a djusted.

This construction is of particular advanquite beyond the grinding wheel to entirely complete the grinding operation thereon before the return movement begins, having the same'elfect as a momentary stoppage of the table or tarry of the movement of the table between its opposite reverse movements. 1

' The shaft 89extends to a point in front of the .inachine" and at its rear end carries apinionIOT meshing with a gear 108 on the rearendof shaft 85. A hand wheel 109 is secured to the front end of the shaft the work.

whereby, it will be observed; the sliding table 72 may be manually operated over the supportlng frame to any desired point. In

this connection it willbe'noted' that the supporting frame 110 which carries bearing for shaft 85, forthe sleeve 88, andfor the shaft 819' is det-achably connected to the main frame of the machine and in practice is covered by a front plate 111 which is inter- I posedbetweenthe upper edge of; tl'ieifront wall 1 and the lower part of thejguide 74, platelll being readily detachable for access to and removal of the entire mechanism ust described if at any time it is desirable as for repairing. Likewise a supporting" frame work 112 carries the variousgearings 58, 59,

and 60 and the shafts associated th E Ie/with it also being back of the front plate 111 and readily removable if desired; It is for this reasonthat shafts Gland 81 are separate and connected together by the coupling82.

i 1 member 113 depends from base 241' in which is located a nut 1141, shaft 115 threading therethrough and being mounted at its rear end in a bearing 116 iii wall '8. At its front end the shaft is squaredextending throughwall 2 and inserting into a socket in another shaft 117 mounted on the frame 110, at its front end carrymg a near 118 which meshes with 'a pinion 119 fixed on the rearendof a sleeve 120 loose upon the shaft 89 wh ch, at its front end in front of the machine, carries a handwheel 121 by neans "of which it maybe rotated in either direction to move the base 24 and the grinding wheel carrled thereby toward or away from shaft-s 115 and 117 permits the removal of the entire mechanism carried by the frame 110 as previously described. a I

vThe cross feed of the grinding wheel, operable manually by turning the hand wheel 121, may also 'be operated auton'iatically if desired. Back of hand wheel 121 isa wheel 122 notched around its entire outer surface. A member 123 is mountedloosely on sleeve 120 and at its upper end fashioned with'a housing or shroud 124: [which comes over wheel 122 and having mounted therein a,

small pinion 125 engaging with the notches of the wheel and which may be-manually operated by a head 126 located on the face of the member 123. A set screw 127 pass ng through the housing 124 and bearing against pinion 125 serves to lock the, wheel andmember 123 together if desired.- There-is also attached to the housing a plate-128 lying adjacent to and conforming tothe outersurface of wheel 122. A lever 129p at its upper end carries a pawl 130 adapted to engagev with the notches ofjwheel 122.- The lower end of the leveris formed: with an inclined face 131 against which one side of a spring pressed plug 132 engages, Saidplug is mounted in a sleeve formed on the The detachable connection of end of a bar 133 pivotally mounted on the frame of the machine and lever 129 is pivotally mounted on an extension to said b'ar abovethe sleeve. The upper end of plug 132 has two angular faces, the face 131 of lever 129 engaging against one of them when it is "in contact with the notched wheel and with the other when it is turned away from the wheel. A sleeve 134 connects with the end of the bar 133 being positioned below it and having sliding engagement within a bracket 135 fixed to the main frame of the machine. A coil spriiTg'136 normally elevates sleeve 134 and the bar 133 to which it is attached. A rod 137 is fixed to the sleeve 134 being positioned within the coil spring and at its end receiving nuts 138 whereby the position ofthe lever 129 with respect to the notched wheel may be adjusted. In addition screws 139. thread upwardly through the bar 133 which is positioned immediately below an extension 140 to the reverse lever 92 and these screws may be adjusted and locked in the usual manner in any desired position. The mechanism descrlbed is operated by .movements of the lever 92 as it is oscillated by the table 72. The movement of the lever 92 to either side of the vertical brings the lower face of extension 140 against the end of a screw 139 thereby depressing the end of the bar 133, and the attached lever 129,

' whereby the member130 rotates the wheel 124 a short'dist-ance and advances the grinding wheelcorre'spondingly toward the work. The amount of the feed is regulated by the adjustment of screws 139 and sleeve 134. Upon the return of the lever 92 to the. vertical, spring 136 moves the lever 129 to its original position the pawl 130 riding over the teeth of wheel 122. By connecting member 123 to wheel 122 the end of the plate 128 approaches closer and closer with each successive feed to the member 130 or until eventually it engages with and moves the pawl 130' away from the wheel 122 automatically stopping the cross feed; and it is apparent that the position of member 128 with respect to the wheel 122 may be set so that the desired amount of material to be ground from the work is determined, the grinding stopping when the work has reached the desired size.

A grinding machine of the construction outlined is of comparatively simple structure and by it all of the controls for the various movements of the mechanism are centralized'in front of the machine. This machine is. as previously described, a simplification of the machine shown in my former application for patent and can be manufactured much more economically and is fullycapable of handling work up to certain sizes. It is of course realized that many'changes in minor detail of construcsider myself entitled to all such modifications which fall within the scope of the appended claims.

I claim 1. In a grinding machine, a sliding table, a support therefor, means to drive the table over the support, reversing mechanism for the table driving means and means mounted on the table adapted to operate the reversing mechanism to change the direction of movement of the table, said means also operating to permit carrying the table a short distance beyond its normal stopping point before beginning its reverse movement.

2. In a grinding machine, a support, a table slidably mounted thereon, stops adjus'tably mounted on and in front of the table, each including a relatively stationary body, a member having a head mounted in the body, and a spring tending to move said head outwardly, means for driving the table over the support, reversing mechanism associated with the driving means and a lever included in the reversing mechanism for operating the same, said lever extending upwardly between said heads. so as to strike thereagainst and compress the springs at opposite extremes of movement of the table,

means for attaching the body to the sliding table of a grinding machine. a pin having a longitudinal open ng therethrough secured 'into the threaded end of the body. a sleeve provided with an outer head slidably in serted in the opposite end of the body, a rod attached to the head, passing lengthwise of the sleeve and through said threaded pin, nuts threaded on to the end of the rod, and a coiled spring within the sleeve interposed between the head and said threaded pm.

4. In combination, a support. a table slidably mounted thereon, a driving shaft at the rear and lengthwise of the support. a shaft located adjacent the front and lengthwise of the machine, a transverse shaft. a worm gear t the rear end of the transverse shafl. a vorm on the driving shaft meshing therewith, gearing connections between the front end of the transverse shaft and the second shaft, means to drive the table back and forth over the support from said second shaft, head and tail stocks on' the table. and

means to drive the work held between said head and tail stocks from said second shaft,

Leashes tabledrivingmechanism including a table reverse mechanism driven by said second shaft, an auxiliary support/for carrying the table driving and reverse mechanism detaehably connected to the main support, a grinding wheel; a transversely adjustable base on which the wheel is mounted, mechanism to movethe .basetransversely of the main support,from in front of the machine,

said mechanism being partially carried by said auxiliary support, and part by the base and main support, and freely detachable a bearing in the rear portion of the main -iary support, said socket receiving the for-.

support, an auxiliary support detachably connected to the main support adjacent the front portion thereof, a shaft provided with a socket therein mounted on the auxilward end of the first shaft, and means to rotate said second shaft, substantially as described. v

7. In a grinding machine, a sliding table, a grinding wheel, means for driving the wheel, means for moving the table back and forth in front of the grinding-wheels, including a reversing lever pivotally mounted at the front of themachine, meanson the table to tilt the lever at the end of each reciproeatory movement of the table, ashaft rotatably mounted transversely of the machine, a sleeve loosely mounted around the shaft, a notched wheel on the end of the sleeve, means operated by rotation vof the sleeve for moving the grinding wheel transs versely of the machine, and extension to the reversing-lever, a horizontal bar pivotally mounted at one end below said extension, a vertical sleeve and a vertical extension formed at the free end of the bar, a lever pivotally mounted on said extension to said bar, a pointed dog secured in rigid relation to the end of the lever,said dog engaging against] the notched wheel, means carried by the sleeve and engaging with the lever to yieldingly force said dog against the notched wheel, ,a spring actuated plunger attached to the sleeve and adjacent screws threading through said bar directly below i and adapted to be associated with said ex- I mounted on the table, a single drive shaft tension to the reversing lever.

8. In combination, a main support, a table slidably mounted thereon to move lengthwise of the support, work holding means for driving the table and the work holding means, gearing connections between said shaft, sald table and Saul work holding means, and two separateauxiliary supports for carrying the same detaehably connected to the main support, whereby either with the mechanism supported thereby. may be removed at will from the :main support.

9. a grinding machine, a main support, a mam driving shaft at the rear of the support, a worm thereon,.a"circular shaft ad vjacent the front of said support, a transverse shaft, a worm wheel at'the rear end thereof engaging, with the worm, a Cbm-r" =bined beveled gear and clutch member.

loosely mounted on the circular shaft, a similar gear at the forward end' of the transverse shaft meshing with said beveled gear, a clutch member splined on the. circular shaft, means to'move the same into and out of engagement with the first clutch member, a table mounted for movements lengthwise of the support, means interposed between the counter shaft and table for operating the same back and forth over the support, work holding devices mounted on the table, and means to drive the same interposed between said counter shaft and said work holding devices, substantially as described.

10. In a grinding machine, a support, a table mounted to move back and forth lengthwise of the support, an elongated roller 'rotatably mounted on the support, a headstock carried by the table, a headstock center rotatably mounted on said headstock, including a pulley connected to said center, an endless belt passing around the roller and pulley, a driven shaft, means to drive the same, a transmission gearing including a second shaft adapted to be driven by said driven shaft, a gear connected to the second shaft, a-pinionon the roller, and gearing "connections between said gear and, pinion.

11. In a grinding machine, a support, a table mounted to move back and forth lengthwise of the support, a headstock including a rotatably mounted headstock center carried by'the table, a shaft, means to drive said shaft, a rotatably mounted I elongated roller mounted on the support,

gearing connections between said shaft and roller fOPdI'lVlIlg sald' roller directly from the shaft, and belt connections between 'the roller and headstock center for center from the roller.

12. In a grinding machine, a support, a base mounted to move transversely of thedriving said support, a. second shaft carried by said base,

a grinding wheel on the shaft, a pulley on said second shaft, a drive pulley on the drive shaft, an idle pulley mounted on the base, a member slidably mounted on the base, an. idle pulley on said member back of the first idle pulley. :1 lug projecting 'upwardly from said member. a second lug similarly projecting from the base, a rod secured to the first lug extending loosely through the second lug, a coiled spring under C()l11' pression around the rod and disposed between the second lug and ahead at the end of the rod, and a belt passing around the pulleys on said shafts and over said idle pulleys. I i

13. In a grinding machine, .a support, a. table mounted for slidable movements back and forth over thesupport, an elongated roller rotatably mounted on the support below the table, aheadstock onjthe table, a

rotatably mounted center mounted on the' headstock said center including a pulley adapted to, receive a belt and located directly above the roller, a belt passing around the roller and pulley, a sleeve slidabl mounted on the support back of the belt, a roller on the end of the sleeve, and a coiled spring under compression housed within the sleeve and disposed with its rear end bearing against the support, substantially as described.

In testimony whereof I aflix my signature.

HARRY J. PERKINS. 

